'\" te
.\" Copyright (C) 2009, Sun Microsystems, Inc. All Rights Reserved.
.\" Copyright 1989 AT&T
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License. You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.
.\"  See the License for the specific language governing permissions and limitations under the License. When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE.  If applicable, add the following below this CDDL HEADER, with
.\" the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
.TH IF_TCP 4P "Sep 02, 2015"
.SH NAME
if_tcp, if \- general properties of Internet Protocol network interfaces
.SH DESCRIPTION
.LP
A network interface is a device for sending and receiving packets on a network.
It is usually a hardware device, although it can be implemented in software.
Network interfaces used by the Internet Protocol (IPv4 or IPv6) must be STREAMS
devices conforming to the Data Link Provider Interface (\fBDLPI\fR). See
\fBdlpi\fR(4P).
.SH APPLICATION PROGRAMMING INTERFACE
.LP
An interface becomes available to \fBIP\fR when it is opened and the \fBIP\fR
module is pushed onto the stream with the \fBI_PUSH\fR \fBioctl\fR(2) command.
(See \fBstreamio\fR(4I)). The \fBSIOCSLIFNAME\fR \fBioctl\fR(2) is issued to
specify the name of the interface and to indicate whether it is IPv4 or IPv6.
This may be initiated by the kernel at boot time or by a user program after the
system is running. Each interface must be assigned an \fBIP\fR address with the
\fBSIOCSLIFADDR\fR \fBioctl()\fR before it can be used. On interfaces where the
network-to-link layer address mapping is static, only the network number is
taken from the \fBioctl()\fR request; the remainder is found in a hardware
specific manner. On interfaces which provide dynamic network-to-link layer
address mapping facilities (for example, Ethernets using \fBarp\fR(4P)), the
entire address specified in the \fBioctl()\fR is used. A routing table entry
for destinations on the network of the interface is installed automatically
when an interface's address is set.
.sp
.LP
You cannot create IPMP IP  interfaces using  the procedure described above.
Instead, use \fBifconfig\fR(8).
.SH IOCTLS
.LP
The following \fBioctl()\fR calls may be used to manipulate \fBIP\fR network
interfaces. Unless specified otherwise, the request takes an \fBlifreq\fR
structure as its parameter. This structure has the form:
.sp
.in +2
.nf
struct lifreq {
#define LIFNAMSIZ	32
   char    lifr_name[LIFNAMSIZ];       /* if name, e.g. "le1" */
   union {
      int    lifru_addrlen;            /* for subnet/token etc */
      uint_t lifru_ppa;                /* SIOCSLIFNAME */
   } lifr_lifru1;
   union {
      struct sockaddr_storage lifru_addr;
      struct sockaddr_storage lifru_dstaddr;
      struct sockaddr_storage lifru_broadaddr;
      struct sockaddr_storage lifru_token;    /* With lifr_addrlen */
      struct sockaddr_storage lifru_subnet;   /* With lifr_addrlen */
      int                     lifru_index;    /* interface index */
      uint64_t                lifru_flags;    /* SIOC?LIFFLAGS */
      int                     lifru_metric;
      uint_t                  lifru_mtu;
      int                     lif_muxid[2];   /* mux id's for arp & ip */
      struct lif_nd_req       lifru_nd_req;   /* SIOCLIF*ND */
      struct lif_ifinfo_req   lifru_ifinfo_req;
      zoneid_t                lifru_zone;     /* SIOC[GS]LIFZONE */
   } lifr_lifru;

#define lifr_addrlen   lifr_lifru1.lifru_addrlen
#define lifr_ppa       lifr_lifru1.lifru_ppa       /* Driver's ppa */
#define lifr_addr      lifr_lifru.lifru_addr       /* address */
#define lifr_dstaddr   lifr_lifru.lifru_dstaddr
#define lifr_broadaddr lifr_lifru.lifru_broadaddr  /* broadcast addr. */
#define lifr_token     lifr_lifru.lifru_token      /* address token */
#define lifr_subnet    lifr_lifru.lifru_subnet     /* subnet prefix */
#define lifr_index     lifr_lifru.lifru_index      /* interface index */
#define lifr_flags     lifr_lifru.lifru_flags      /* flags */
#define lifr_metric    lifr_lifru.lifru_metric     /* metric */
#define lifr_mtu       lifr_lifru.lifru_mtu        /* mtu */
#define lifr_ip_muxid  lifr_lifru.lif_muxid[0]
#define lifr_arp_muxid lifr_lifru.lif_muxid[1]
#define lifr_nd        lifr_lifru.lifru_nd_req     /* SIOCLIF*ND */
#define lifr_ifinfo    lifr_lifru.lifru_ifinfo_req /* SIOC[GS]LIFLNKINFO */
#define lifr_zone      lifr_lifru.lifru_zone       /* SIOC[GS]LIFZONE */
};
.fi
.in -2

.sp
.ne 2
.na
\fB\fBSIOCSLIFADDR\fR\fR
.ad
.RS 19n
Set interface address.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGLIFADDR\fR\fR
.ad
.RS 19n
Get interface address.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSLIFDSTADDR\fR\fR
.ad
.RS 19n
Set point to point address for interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGLIFDSTADDR\fR\fR
.ad
.RS 19n
Get point to point address for interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSLIFFLAGS\fR\fR
.ad
.RS 19n
Set interface flags field. If the interface is marked down, any processes
currently routing packets through the interface are notified.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGLIFFLAGS\fR\fR
.ad
.RS 19n
Get interface flags.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGLIFCONF\fR\fR
.ad
.RS 19n
Get interface configuration list. This request takes a \fBlifconf\fR structure
(see below) as a value-result parameter. The \fBlifc_family\fR field can  be
set to \fBAF_UNSPEC\fR to retrieve both \fBAF_INET\fR and \fBAF_INET6\fR
interfaces. The \fBlifc_len\fR field should be set to the size of the buffer
pointed to by \fBlifc_buf\fR.
.sp
The \fBlifc_flags\fR field should usually be set to zero, but callers that need
low-level knowledge of the  underlying IP interfaces that comprise an IPMP
group can set  it  to \fBLIFC_UNDER_IPMP\fR to request that those interfaces be
included in the result. Upon success, \fBlifc_len\fR contains the length, in
bytes, of the array  of \fBlifreq\fR structures pointed to  by \fBlifc_req\fR.
For each \fBlifreq\fR structure, the \fBlifr_name\fR and \fBlifr_addr\fR fields
are valid.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGLIFNUM\fR\fR
.ad
.RS 19n
Get number of interfaces. This request returns an integer which is the number
of interface descriptions (\fBstruct lifreq\fR) returned by the
\fBSIOCGLIFCONF\fR ioctl (in other words, indicates how large \fBlifc_len\fR
must be).
.sp
This  request  takes a \fBstruct  lifnum\fR (see below) as a value-result
parameter. The \fBlifn_family\fR field can  be set to \fBAF_UNSPEC\fR to count
both \fBAF_INET\fR and \fBAF_INET6\fR interfaces. The \fBlifn_flags\fR field
should usually be set to zero, but callers that need low-level knowledge of the
underlying IP interfaces that comprise an  IPMP group can set it to
\fBLIFC_UNDER_IPMP\fR to request that those interfaces be included in the
count.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSLIFMTU\fR\fR
.ad
.RS 19n
Set the maximum transmission unit (MTU) size for interface. Place the request
in the \fBlifru_mtu\fR field. The \fBMTU\fR can not exceed the physical
\fBMTU\fR limitation  (which is reported in the  \fBDLPI\fR \fBDL_INFO_ACK\fR
message).
.RE

.sp
.ne 2
.na
\fB\fBSIOCGLIFMTU\fR\fR
.ad
.RS 19n
Get the maximum transmission unit size for interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSLIFMETRIC\fR\fR
.ad
.RS 19n
Set the metric associated with the interface.  The metric is used by routing
daemons such as \fBin.routed\fR(8).
.RE

.sp
.ne 2
.na
\fB\fBSIOCGLIFMETRIC\fR\fR
.ad
.RS 19n
Get the metric associated with the interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGLIFMUXID\fR\fR
.ad
.RS 19n
Get the \fBip\fR and \fBarp\fR \fBmuxid\fR associated with the interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSLIFMUXID\fR\fR
.ad
.RS 19n
Set the \fBip\fR and \fBarp\fR \fBmuxid\fR associated with the interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGLIFINDEX\fR\fR
.ad
.RS 19n
Get the interface index associated with the interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSLIFINDEX\fR\fR
.ad
.RS 19n
Set the interface index associated with the interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGLIFZONE\fR\fR
.ad
.RS 19n
Get the zone associated with the interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSLIFZONE\fR\fR
.ad
.RS 19n
Set the zone associated with the interface. Only applies for zones that use the
shared-IP instance.
.RE

.sp
.ne 2
.na
\fB\fBSIOCLIFADDIF\fR\fR
.ad
.RS 19n
Add a new logical interface on a physical interface using an unused logical
interface number.
.RE

.sp
.ne 2
.na
\fB\fBSIOCLIFREMOVEIF\fR\fR
.ad
.RS 19n
Remove a logical interface by specifying its \fBIP\fR address or logical
interface name.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSLIFTOKEN\fR\fR
.ad
.RS 19n
Set the address token used to form IPv6 link-local addresses and for stateless
address autoconfiguration.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGLIFTOKEN\fR\fR
.ad
.RS 19n
Get the address token used to form IPv6 link-local addresses and for stateless
address autoconfiguration.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSLIFSUBNET\fR\fR
.ad
.RS 19n
Set the subnet prefix associated with the interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGLIFSUBNET\fR\fR
.ad
.RS 19n
Get the subnet prefix associated with the interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSLIFLNKINFO\fR\fR
.ad
.RS 19n
Set link specific parameters for the interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGLIFLNKINFO\fR\fR
.ad
.RS 19n
Get link specific parameters for the interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCLIFDELND\fR\fR
.ad
.RS 19n
Delete a neighbor cache entry for  IPv6.
.RE

.sp
.ne 2
.na
\fB\fBSIOCLIFGETND\fR\fR
.ad
.RS 19n
Get a neighbor cache entry for  IPv6.
.RE

.sp
.ne 2
.na
\fB\fBSIOCLIFSETND\fR\fR
.ad
.RS 19n
Set a neighbor cache entry for  IPv6.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSLIFUSESRC\fR\fR
.ad
.RS 19n
Set the interface from which to choose a source address. The \fBlifr_index\fR
field has the interface index corresponding to the interface whose address is
to be used as the source address for packets going out on the interface whose
name is provided by \fBlifr_name\fR. If the \fBlifr_index\fR field is set to
zero, the previous setting is cleared.  See \fBifconfig\fR(8) for examples of
the \fBusesrc\fR option.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGLIFUSESRC\fR\fR
.ad
.RS 19n
Get the interface index of the interface whose address is used as the source
address for packets going out on the interface provided by \fBlifr_name\fR
field. The value is retrieved in the \fBlifr_index\fR field. See
\fBifconfig\fR(8) for examples of the \fBusesrc\fR option.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGLIFSRCOF\fR\fR
.ad
.RS 19n
Get the interface configuration list for interfaces that use an address hosted
on the interface provided by the \fBlifs_ifindex\fR field in the \fBlifsrcof\fR
struct (see below), as a source address. The application sets \fBlifs_maxlen\fR
to the size (in bytes) of the buffer it has allocated for the data. On return,
the kernel sets \fBlifs_len\fR to the actual size required. Note, the
application could set \fBlifs_maxlen\fR to zero to query the kernel of the
required buffer size instead of estimating a buffer size. The application tests
\fBlifs_len\fR <= \fBlifs_maxlen\fR -- if that's true,  the buffer was big
enough and the application has an accurate list.  If it is false, it needs to
allocate a bigger buffer and try again, and \fBlifs_len\fR provides a hint of
how big to make the next trial. See \fBifconfig\fR(8) for examples of the
\fBusesrc\fR option.
.RE

.sp
.ne 2
.na
\fB\fBSIOCTONLINK\fR\fR
.ad
.RS 19n
Test if the address is directly reachable, for example, that it can be reached
without going through a router. This request takes an \fBsioc_addrreq\fR
structure (see below) as a value-result parameter. The \fBsa_addr\fR field
should be set to the address to test. The \fBsa_res\fR field will contain a
non-zero value if the address is onlink.
.RE

.sp
.ne 2
.na
\fB\fBSIOCTMYADDR\fR\fR
.ad
.RS 19n
Test if the address is assigned to this node. This request takes an
\fBsioc_addrreq\fR structure (see below) as a value-result parameter. The
\fBsa_addr\fR field should be set to the address to test. The \fBsa_res\fR
field will contain a non-zero value if the address is assigned to this node.
.RE

.sp
.ne 2
.na
\fB\fBSIOCTMYSITE\fR\fR
.ad
.RS 19n
Test if the address is part of the same site as this node. This request takes
an \fBsioc_addrreq\fR structure (see below) as a value-result parameter. The
\fBsa_addr\fR field should be set to the address to test. The \fBsa_res\fR
field will contain a non-zero value if the address is in the same site.
.RE

.sp
.LP
The structure used by \fBSIOCGLIFCONF\fR has the form:
.sp
.in +2
.nf
struct lifconf {
   sa_family_t     lifc_family;
   int             lifc_flags;       /* request specific
                                     /* interfaces */
   int             lifc_len;         /* size of assoc. buffer */
   union {
      caddr_t      lifcu_buf;
      struct lifreq *lifcu_req;
   } lifc_lifcu;

#define lifc_buf lifc_lifcu.lifcu_buf   /* buffer address */
#define lifc_req lifc_lifcu.lifcu_req   /* array of structs returned */
};
.fi
.in -2

.sp
.LP
The structure used by \fBSIOCGLIFNUM\fR has the form:
.sp
.in +2
.nf
struct lifnum {
   sa_family_t     lifn_family;
   int             lifn_flags;   /* req. specf. interfaces */
   int             lifn_count;   /* Result */
};
.fi
.in -2

.sp
.LP
The structure used by \fBSIOCTONLINK\fR, \fBSIOCTMYADDR\fR and
\fBSIOCTMYSITE\fR has the form:
.sp
.in +2
.nf
struct sioc_addrreq {
   struct sockaddr_storage sa_addr; /* Address to test */
   int                     sa_res;  /* Result - 0/1 */
};
.fi
.in -2

.sp
.LP
The structure used by \fBSIOCGLIFSRCOF\fR has the form:
.sp
.in +2
.nf
 struct lifsrcof {
     uint_t  lifs_ifindex;   /* addr on this interface */
                             /* used as the src addr */
     size_t  lifs_maxlen;    /* size of buffer: input */
     size_t  lifs_len;       /* size of buffer: output */
     union {
            caddr_t lifsu_buf;
            struct  lifreq *lifsu_req;
   } lifs_lifsu;
#define lifs_buf lifs_lifsu.lifsu_buf /* buffer addr. */
#define lifs_req lifs_lifsu.lifsu_req /* array returned */
};
.fi
.in -2

.sp
.LP
The following \fBioctl()\fR calls are maintained for compatibility but only
apply to IPv4 network interfaces, since the data structures are too small to
hold an IPv6 address. Unless specified otherwise, the request takes an
\fBifreq\fR structure as its parameter. This structure has the form:
.sp
.in +2
.nf
struct ifreq {
#define IFNAMSIZ	16
 char	ifr_name[IFNAMSIZ];              /* interface name - e.g. "hme0" */
 union {
	   struct sockaddr	ifru_addr;
	   struct sockaddr	ifru_dstaddr;
	   struct sockaddr	ifru_broadaddr;
	   short ifru_flags;
	   int   ifru_metric;
	   int   if_muxid[2];                   /* mux id's for arp and ip */
	   int   ifru_index;	                 /* interface index */
	} ifr_ifru;

#define ifr_addr      ifr_ifru.ifru_addr       /* address */
#define ifr_dstaddr   ifr_ifru.ifru_dstaddr    /* other end of p-to-p link */
#define ifr_broadaddr ifr_ifru.ifru_broadaddr  /* broadcast address */
#define ifr_flags     ifr_ifru.ifru_flags      /* flags */
#define ifr_index     ifr_ifru.ifru_index      /* interface index  */
#define ifr_metric    ifr_ifru.ifru_metric     /* metric */
};
.fi
.in -2

.sp
.ne 2
.na
\fB\fBSIOCSIFADDR\fR\fR
.ad
.RS 18n
Set interface address.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGIFADDR\fR\fR
.ad
.RS 18n
Get interface address.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSIFDSTADDR\fR\fR
.ad
.RS 18n
Set point to point address for interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGIFDSTADDR\fR\fR
.ad
.RS 18n
Get point to point address for interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSIFFLAGS\fR\fR
.ad
.RS 18n
Set interface flags field. If the interface is marked down, any processes
currently routing packets through the interface are notified.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGIFFLAGS\fR\fR
.ad
.RS 18n
Get interface flags.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGIFCONF\fR\fR
.ad
.RS 18n
Get interface configuration list. This request takes an \fBifconf\fR structure
(see below) as a value-result parameter. The \fBifc_len\fR field should be set
to the size of the buffer pointed to by \fBifc_buf\fR. Upon success,
\fBifc_len\fR will contain the length, in bytes, of the array of \fBifreq\fR
structures pointed to by \fBifc_req\fR. For each \fBifreq\fR structure, the
\fBifr_name\fR and \fBifr_addr\fR fields are valid.  Though IPMP IP interfaces
are included in the array, underlying IP interfaces that comprise those IPMP
groups are not.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGIFNUM\fR\fR
.ad
.RS 18n
Get number of interfaces. This request returns an integer which is the number
of interface descriptions (\fBstruct ifreq\fR) returned by the
\fBSIOCGIFCONF\fR ioctl (in other words, indicates how large \fBifc_len\fR must
be).  Though IPMP IP interfaces are included  in the array, underlying IP
interfaces that comprise those IPMP groups are not.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSIFMTU\fR\fR
.ad
.RS 18n
Set the maximum transmission unit (\fBMTU\fR) size for interface. Place the
request in the \fBifr_metric\fR field. The \fBMTU\fR has to be smaller than
physical \fBMTU\fR limitation (which is reported in the \fBDLPI\fR
\fBDL_INFO_ACK\fR message).
.RE

.sp
.ne 2
.na
\fB\fBSIOCGIFMTU\fR\fR
.ad
.RS 18n
Get the maximum transmission unit size for interface. Upon success, the request
is placed in the \fBifr_metric\fR field.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSIFMETRIC\fR\fR
.ad
.RS 18n
Set the metric associated with the interface.  The metric is used by routine
daemons such as \fBin.routed\fR(8).
.RE

.sp
.ne 2
.na
\fB\fBSIOCGIFMETRIC\fR\fR
.ad
.RS 18n
Get the metric associated with the interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGIFMUXID\fR\fR
.ad
.RS 18n
Get the \fBip\fR and \fBarp\fR \fBmuxid\fR associated with the interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSIFMUXID\fR\fR
.ad
.RS 18n
Set the \fBip\fR and \fBarp\fR \fBmuxid\fR associated with the interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCGIFINDEX\fR\fR
.ad
.RS 18n
Get the interface index associated with the interface.
.RE

.sp
.ne 2
.na
\fB\fBSIOCSIFINDEX\fR\fR
.ad
.RS 18n
Set the interface index associated with the interface.
.RE

.sp
.LP
The \fBifconf\fR structure has the form:
.sp
.in +2
.nf
struct ifconf {
 int	ifc_len;                        /* size of assoc. buffer */
 union {
	   caddr_t        ifcu_buf;
	   struct ifreq  *ifcu_req;
	} ifc_ifcu;

#define ifc_buf   ifc_ifcu.ifcu_buf   /* buffer address */
#define ifc_req   ifc_ifcu.ifcu_req   /* array of structs returned */
};
.fi
.in -2

.SS "IFF_ Flags"
.LP
You can use the \fBifconfig\fR(8) command to display the \fBIFF\fR_ flags
listed below (with the leading \fBIFF\fR_ prefix removed). See the
\fBifconfig\fR(8) manpage for a definition of each flag.
.sp
.in +2
.nf
#define IFF_UP          0x0000000001    /* Address is up */
#define IFF_BROADCAST   0x0000000002    /* Broadcast address valid */
#define IFF_DEBUG       0x0000000004    /* Turn on debugging */
#define IFF_LOOPBACK    0x0000000008    /* Loopback net */

#define IFF_POINTOPOINT 0x0000000010    /* Interface is p-to-p */
#define IFF_NOTRAILERS  0x0000000020    /* Avoid use of trailers */
#define IFF_RUNNING     0x0000000040    /* Resources allocated */
#define IFF_NOARP       0x0000000080    /* No address res. protocol */

#define IFF_PROMISC     0x0000000100    /* Receive all packets */
#define IFF_ALLMULTI    0x0000000200    /* Receive all multicast pkts */
#define IFF_INTELLIGENT 0x0000000400    /* Protocol code on board */
#define IFF_MULTICAST   0x0000000800    /* Supports multicast */

#define IFF_MULTI_BCAST 0x0000001000    /* Multicast using broadcst. add. */
#define IFF_UNNUMBERED  0x0000002000    /* Non-unique address */
#define IFF_DHCPRUNNING 0x0000004000    /* DHCP controls interface */
#define IFF_PRIVATE     0x0000008000    /* Do not advertise */

#define IFF_NOXMIT      0x0000010000    /* Do not transmit pkts */
#define IFF_NOLOCAL     0x0000020000    /* No address - just on-link subnet */
#define IFF_DEPRECATED  0x0000040000    /* Address is deprecated */
#define IFF_ADDRCONF    0x0000080000    /* Addr. from stateless addrconf */

#define IFF_ROUTER      0x0000100000    /* Router on interface */
#define IFF_NONUD       0x0000200000    /* No NUD on interface */
#define IFF_ANYCAST     0x0000400000    /* Anycast address */
#define IFF_NORTEXCH    0x0000800000    /* Don't xchange rout. info */

#define IFF_IPV4        0x0001000000    /* IPv4 interface */
#define IFF_IPV6        0x0002000000    /* IPv6 interface */
#define IFF_NOFAILOVER  0x0008000000    /* in.mpathd test address */
#define IFF_FAILED      0x0010000000    /* Interface has failed */

#define IFF_STANDBY     0x0020000000    /* Interface is a hot-spare */
#define IFF_INACTIVE    0x0040000000    /* Functioning but not used */
#define IFF_OFFLINE     0x0080000000    /* Interface is offline */
#define IFF_XRESOLV     0x0100000000    /* IPv6 external resolver */

#define IFF_COS_ENABLED 0x0200000000    /* If CoS marking is supported */
#define IFF_PREFERRED   0x0400000000    /* Prefer as source address */
#define IFF_TEMPORARY   0x0800000000    /* RFC3041 */
#define IFF_FIXEDMTU    0x1000000000    /* MTU set with SIOCSLIFMTU */

#define IFF_VIRTUAL     0x2000000000    /* Cannot send/receive pkts */
#define IFF_DUPLICATE   0x4000000000    /* Local address in use */
#define IFF_IPMP        0x8000000000    /* IPMP IP interface */
.fi
.in -2

.SH ERRORS
.ne 2
.na
\fB\fBEPERM\fR\fR
.ad
.RS 12n
Calling process has insufficient privileges.
.RE

.sp
.ne 2
.na
\fB\fBENXIO\fR\fR
.ad
.RS 12n
The  \fBlifr_name\fR member of the  \fBlifreq\fR structure contains an invalid
value.
.sp
For \fBSIOCGLIFSRCOF\fR, the \fBlifs_ifindex\fR member of the \fBlifsrcof\fR
structure contains an invalid value.
.sp
For \fBSIOCSLIFUSESRC\fR, this error is returned if the \fBlifr_index\fR is set
to an invalid value.
.RE

.sp
.ne 2
.na
\fB\fBEBADADDR\fR\fR
.ad
.RS 12n
Wrong address family or malformed address.
.RE

.sp
.ne 2
.na
\fB\fBEINVAL\fR\fR
.ad
.RS 12n
For \fBSIOCSLIFMTU\fR, this error is returned when the requested \fBMTU\fR size
is invalid. This error indicates the \fBMTU\fR size is greater than the
\fBMTU\fR size supported by the \fBDLPI\fR provider or less than \fB68\fR (for
IPv4) or less than \fB1280\fR (for IPv6).
.sp
For \fBSIOCSLIFUSESRC\fR, this error is returned if either the \fBlifr_index\fR
or \fBlifr_name\fR identify interfaces that are already part of an existing
IPMP group.
.RE

.sp
.ne 2
.na
\fB\fBEEXIST\fR\fR
.ad
.RS 12n
For \fBSIOCLIFADDIF\fR, this error is returned if the \fBlifr_name\fR member in
the \fBlifreq\fR structure corresponds to an interface that already has the PPA
specified by \fBlifr_ppa\fR plumbed.
.RE

.SH SEE ALSO
.LP
.BR ioctl (2),
.BR sockaddr (3SOCKET),
.BR streamio (4I),
.BR arp (4P),
.BR dlpi (4P),
.BR ip (4P),
.BR ip6 (4P),
.BR ndp (4P),
.BR ifconfig (8),
.BR in.routed (8)
